public class Test
public static void main(String [] args)
{
String str="";
for (int i = 1; i < 1000; i++) {
for (a = 2; a <= (int)i/2; a++) {
if (i % a == 0) {
break;
}
}
if (a > (int)i/2 ) {
str+=String.valueOf(i)+","
}
}
}
}
System.out.println("1000 以内的质数:"+str);